﻿<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:bindingConverters="clr-namespace:Peter.Common.BindingConverters;assembly=Peter.Common"
                    xmlns:utilities="clr-namespace:Peter.Common.Utilities;assembly=Peter.Common">

   <Style x:Key="ExpandCollapseToggleStyle"
          TargetType="ToggleButton">
      <Setter Property="Focusable"
              Value="False" />
      <Setter Property="Template">
         <Setter.Value>
            <ControlTemplate TargetType="ToggleButton">
               <Grid Width="15"
                     Height="13"
                     Background="Transparent">
                  <Path x:Name="ExpandPath"
                        HorizontalAlignment="Left"
                        VerticalAlignment="Center"
                        Margin="1,1,1,1"
                        Fill="{DynamicResource AlternateBrush}"
                        Data="M 4 0 L 8 4 L 4 8 Z" />
               </Grid>
               <ControlTemplate.Triggers>
                  <Trigger Property="IsChecked"
                           Value="True">
                     <Setter Property="Data"
                             TargetName="ExpandPath"
                             Value="M 0 4 L 8 4 L 4 8 Z" />
                  </Trigger>
               </ControlTemplate.Triggers>
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>

   <Style x:Key="TreeViewItemFocusVisual">
      <Setter Property="Control.Template">
         <Setter.Value>
            <ControlTemplate>
               <Border>
                  <Rectangle Margin="0,0,0,0"
                             StrokeThickness="5"
                             Stroke="Black"
                             StrokeDashArray="1 2"
                             Opacity="0" />
               </Border>
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>

   <Style x:Key="{x:Type TreeViewItem}"
          TargetType="{x:Type TreeViewItem}">
      <Setter Property="Background"
              Value="Transparent" />
      <Setter Property="HorizontalContentAlignment"
              Value="{Binding Path=HorizontalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
      <Setter Property="VerticalContentAlignment"
              Value="{Binding Path=VerticalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
      <Setter Property="Padding"
              Value="1,0,0,0" />
      <Setter Property="Foreground"
              Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
      <Setter Property="FocusVisualStyle"
              Value="{StaticResource TreeViewItemFocusVisual}" />
      <Setter Property="IsExpanded"
              Value="{Binding IsExpanded, Mode=TwoWay}" />
      <Setter Property="IsSelected"
              Value="{Binding IsSelected, Mode=TwoWay}" />
      <Setter Property="utilities:TreeViewItemBehavior.IsBroughtIntoViewWhenSelected"
              Value="True" />
      <Setter Property="Template">
         <Setter.Value>
            <ControlTemplate TargetType="{x:Type TreeViewItem}">
               <ControlTemplate.Resources>
                  <bindingConverters:LeftMarginMultiplierConverter Length="19"
                                                                   x:Key="LengthConverter" />
               </ControlTemplate.Resources>
               <StackPanel>
                  <Border Name="Bd"
                          Background="{TemplateBinding Background}"
                          BorderBrush="{TemplateBinding BorderBrush}"
                          BorderThickness="{TemplateBinding BorderThickness}"
                          Padding="{TemplateBinding Padding}">
                     <Grid Margin="{Binding Converter={StaticResource LengthConverter},
                              RelativeSource={RelativeSource TemplatedParent}}">
                        <Grid.ColumnDefinitions>
                           <ColumnDefinition Width="19" />
                           <ColumnDefinition />
                        </Grid.ColumnDefinitions>
                        <ToggleButton x:Name="Expander"
                                      Style="{StaticResource ExpandCollapseToggleStyle}"
                                      IsChecked="{Binding Path=IsExpanded,
                              RelativeSource={RelativeSource TemplatedParent}}"
                                      ClickMode="Press" />

                        <ContentPresenter x:Name="PART_Header"
                                          Grid.Column="1"
                                          ContentSource="Header"
                                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" />
                     </Grid>
                  </Border>
                  <ItemsPresenter x:Name="ItemsHost" />
               </StackPanel>
               <ControlTemplate.Triggers>
                  <Trigger Property="IsExpanded"
                           Value="false">
                     <Setter TargetName="ItemsHost"
                             Property="Visibility"
                             Value="Collapsed" />
                  </Trigger>
                  <Trigger Property="HasItems"
                           Value="false">
                     <Setter TargetName="Expander"
                             Property="Visibility"
                             Value="Hidden" />
                  </Trigger>
                  <MultiTrigger>
                     <MultiTrigger.Conditions>
                        <Condition Property="HasHeader"
                                   Value="false" />
                        <Condition Property="Width"
                                   Value="Auto" />
                     </MultiTrigger.Conditions>
                     <Setter TargetName="PART_Header"
                             Property="MinWidth"
                             Value="75" />
                  </MultiTrigger>
                  <MultiTrigger>
                     <MultiTrigger.Conditions>
                        <Condition Property="HasHeader"
                                   Value="false" />
                        <Condition Property="Height"
                                   Value="Auto" />
                     </MultiTrigger.Conditions>
                     <Setter TargetName="PART_Header"
                             Property="MinHeight"
                             Value="19" />
                  </MultiTrigger>
                  <Trigger Property="IsSelected"
                           Value="true">
                     <Setter TargetName="Bd"
                             Property="Background"
                             Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
                     <Setter Property="Foreground"
                             Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
                  </Trigger>
                  <MultiTrigger>
                     <MultiTrigger.Conditions>
                        <Condition Property="IsSelected"
                                   Value="true" />
                        <Condition Property="IsSelectionActive"
                                   Value="false" />
                     </MultiTrigger.Conditions>
                     <Setter TargetName="Bd"
                             Property="Background"
                             Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
                     <Setter Property="Foreground"
                             Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
                  </MultiTrigger>
                  <Trigger Property="IsEnabled"
                           Value="false">
                     <Setter Property="Foreground"
                             Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                  </Trigger>
               </ControlTemplate.Triggers>
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>

</ResourceDictionary>